Ganymed SSH-2: Java based SSH-2 Protocol Implementation
The Ganymed SSH-2 library allows one to connect to SSH servers from within Java programs. It supports SSH sessions (remote command execution and shell access), local and remote port forwarding, local stream forwarding, X11 forwarding, SCP and SFTP. There are no dependencies on any JCE provider, as all crypto functionality is included.
Ganymed SSH-2 for Java is the de-facto standard for open source based SSH communication in Java software. The library is used in many industrial products but also in open source software, e.g., in the widely used SVN plugin for Eclipse and in Cyberduck (a popular SFTP client for the Mac).
Originally, Ganymed SSH-2 for Java was developed by Dr. Christian Plattner for the Ganymed replication project at ETH Zurich, Switzerland, back in 2005. In the meantime, its clearly structured code has been ported by different people to other languages as well. Confusingly, there are also Java branches with slightly different names. However, Ganymed SSH-2 for Java is the original implementation with a stable interface that is backwards compatible to the first implementation written in 2005 (!).

Darik's Boot and Nuke ("DBAN") is a self-contained boot disk that securely wipes the hard disks of most computers. DBAN will automatically and completely delete the contents of any hard disk that it can detect, which makes it an appropriate utility for bulk or emergency data destruction.

Schlage Shows New Security Features At the Consumer Electronics Show 2010Schlage will preview new capabilities for its Schlage LiNK home-management system at the Consumer Electronics Show 2010 in Las Vegas that allow Schlage wireless keypad locks to be...

Nmap ("Network Mapper") is a free and open source (license) utility for network exploration or security auditing. Many systems and network administrators also find it useful for tasks such as network inventory, managing service upgrade schedules, and monitoring host or service uptime.

Ophcrack is a free Windows password cracker based on rainbow tables. It is a very efficient implementation of rainbow tables done by the inventors of the method. It comes with a Graphical User Interface and runs on multiple platforms.

JUG is a pure java UUID generator, that can be used either as a component in a bigger application, or as a standalone command line tool (a la 'uuidgen'). UUIDs are 128-bit Universally Unique IDentifiers (aka GUID, Globally Unique IDentifier used in Windows world).
JUG generates UUIDs according to the IETF UUID draft specification (and further clarified in UUID URN name space IETF draft ) – all 3 'official' types defined by the draft – is fast, portable and Open Source (as well as Free Software ).
You can use JUG in your application according to the license terms of LGPL (Lesser General Public License); or, from version 2.0 on, ASL . See Download page for more details.
From version 1.0.0 on, native code (invoked via JNI) for accessing Ethernet MAC address is included with Jug distribution. Big thanks to Paul Blankenbaker and DJ Hagberg (amongst others) for their code contributions!
Note that using this functionality is optional: only time+location - based generation needs MAC address, and even with it, one can just pass the address from a configuration file.
Currently JNI-based Ethernet MAC address support is available on following platforms:
* Linux / x86
* Windows (98, ME, NT, 2K, XP?) / x86
* Solaris / Sparc
* Mac OS X
* FreeBSD / x86
Note: if anyone can recompile Mac OS X JNI code on Open/NetBSD and try if if it works, that would be useful (FreeBSD JNI code was compiled this way).

The Sleuth Kit and Autopsy Browser. Both are open source digital investigation tools (a.k.a. digital forensic tools) that run on Unix systems (such as Linux, OS X, FreeBSD, OpenBSD, and Solaris). They can be used to analyze NTFS, FAT, Ext2, Ext3, UFS1, and UFS2 file systems and several volume system types.